Consin



imatented May 10, i927.

'u tra si a s `errer..

I-OMER S. ROGERS, Ol? MXLWAUKE, WSCQlil-il'll,

CNSIN.

Application tiled February 2G, 1922. Serial No. 537,806.

rlhis invention relates to pneumatic pumps 'and the object ot the invention is to improve the construction and operation of pneumatic pumps in the manner to be hereinatter described and claimed.

Referring to the drawing which accompanies this speeiiication and tormsa part hereof, which drawing),` illustrates an embodiment of this invention, the figure of the drawing' illustrates a vertical section of` a pneumatic pump.

l'elferrinp,l to the drawing, the reference mmierals 1 and 2 designate pump chambers which may be constructed in any suitable manner. 'lhe drawing illustrates the pump chambers as ot different sizes merely to show a. compact arrangement of parts fora smallbei-e. well, as equali ty or inequality oi size of the pump chambers has nothiine,l to do with the principle or" operation ot' the pump. The pump chambers are provided with inletwater valves 3 and Lla illustrated as gravity check-valves, and water outlet valves 5 and 6, illustrated as springbaclred check-valves, and the principle ot operation of these valves is `the principle ot an ordinary check-valve which opens to permit Fluid to pass in one direction and closes to prevent the passage et the iiuid in the opposite direction. The pump, when in use, is submerged in water, and the compressed air forces the water from the pump chambers through a water discharge pipe i' to the place desired. Compressed air may be conducted to the pump iu any suitable manner, as by a pipe S lor example, and is admitted to the pump chamber 1 only when the compressed air valve 9 is open, and is admitted to the pump chamber 2 only when the eoi'upressed air valve 10 is open. The compressed air valves 9 and 10 will be referred to as air admission valves. rlhe pump chamber 1 is provided with an air exhaust port 11 adapted to be closed or openedby an air exhaust valve 12, and the pump chamber 2 is provided with an air exhaust port 13 adapted to be closed or opened by an air exhaust valve 14. The air admission valves 9 and 10 are illus trated as poppet valves provided with springs 15 and 16 tending to close them with the pressure. or. in other words, in the direction of the flow of the compressed air. The air admission valves will7 consequently, always remain closed unless opened and retained opened by some mechanism. The

poppet type oit valve is a simple construction and an overthrow of its opening,l movement doesnot tend to restrict the passageA way :tor thefiow ot fluid so thatit lendsitselt admirably to situations where close adjustments are to be avoided. In the construction illustrated by the drawing, the air exhaust valves 12 and 14 are movable hori Zontally and are connected by a rod 17 so that as one is closed the other is opened. Any suitable means may be employed for "nuidine1 these valves, as for example guides 18 and 16, and a light spring` 19 maybe used to keep the air exhaust `valve 12 closed, the `air exlmust valve 14 open, and the air admission valve 9 open when the pump is not under compressed air. Under such a condition the spring 16 will keep the air admission valve 10 closed so that these valves cannot occupy indefinite or indeterminate positions when the pump is not under compressed air. The result that the pump will always start operating, if submerged, when the compressed" air is admitted to the pipe 8. The tension or power exerted by the springs 1,5 and 16 need not be of any particular amount except that, with the specific construction shown, the spring 19 should be sutiiciently powerful to compress the spring and the combined tensions of the springs 16 and 19 and the air pressure on the air admission valve 10, when closed, should be less than the power which can be exerted by a motor meehunism to be described.

'lriiniing` mechanism is employed to open the air admission valves 9 and 10 while the air exhaust valves 12 and la are being` moved and a very simple and efficient construction is shown by the drawing consisting of the bell-crank levers 20 and 21 pivoted to ears 22 and 23. @ne arm ot the bell-crank lever 20 engages in a recess 241 in the air exhaust valve 12 and 'the other arm extends under a stem 25 projecting downwardly from the air admissionvalve 9. In a similar operating,` manner one arm of the bell-crank lever 21 engages in a recess 26 in the air exhaust valve 14 and its other arm extends under a stem Q7 projecting downwardly from the air admission valve 10. The principle of the construction is that the bell-crank levers 20 and 21 are disconnected from the air admis` sion valves 9 and 1-0 so that the closingof the air admission valves 9 and 1() does not prevent eontinuations ,Ot movements of the air exhaust valves 12 and ifi, while the overtravel of the air admission `4vulves t) and 10 in opening does not tend to restrict thc port or lthoroughtare `areas controlled. by these valves. The air admission valves 3) and 1 0 and the air exhaust valves .i2 and 14; are illust-rated by the drawing as poppct Vvulves and their necessary litt tor iull openingot their ports is one-quarter et the diameters of their respect-ive ports less the litt resulb ingiifroin the partial .reduction ot the port areas by `ithe `rod 17 and 4the stems 25 and 27, but an yoverlitt er overthrow et these valves will not tend to diminish the port areas controlled by them. The valve movements canptheretore, be entirely independent of each other ,as tar as extent oft movement is concerned, and this principle et independence ot `movement of these valves may be characterized as'independence ot seating movement, and aindependence ot overthrow in opening` movement. The construetional point ito be observed is 4that the movements otthe air exhaust valves 12 and 14 be sutli* ient 'to open the air admission valves 9 and v1() and to `permit them to close, as is clearly illustrated by the drawing Where the bell-cranlrlever 21 is shown in contact with the stem 27 of the air admission valve 10 and the `bell-crank lever 2O is shown as not contacting-With the stem'25 of the air ad* mission valve 9. The reason for the construction illustrated and described is because it is vcustomaryto tace the valves with a nonmetallicniaterial 28, Which is clearly shown in connection -ivith the air exhaust valves 12 and 14, to secure air tight joints when the valves are seated upon their seats. These sovcalled ualvetacings are subject to changes in .volume With change oit conditions so that the actual extent ot movement required to seat Aa valve indefinite. The construction described 'and illustrated permits any one ot the four `vaiif'es, the air admission valves and Ithe air exhaust valves, to be properly seated air tight `notwithstending` the indeitiniteness of the actual point oil seating ot any one or `more ot them.

A "flever 29 is pivoted to the rod 1i' by a pin 30 and is pivoted to the head 31 by a pivot3-2. A ytlu-idepressure motor 83, coinprising aidiaphragm 34-, a head 35, plunger 36, stem :3.7 ,and spring; 38, is connected with the pump chamber 1 byy a pipe 39 which ein tcndsrbelovv the low ivatcr .level in the pump chamber l and lhasits open lower end controlled by a valve 40 Whiehis either opened or closed iby a iioat L11 guided `by a guide 42. The ipipe 39 communicates with a iiuid chamber ftflbetwecu the diaphragm Si and the ahead.' 35. so that when the -tloat fl-l opens thetalvefslO-:ivater `Will-bei'forced by the conipgresseel `iairpinto theliiuid chamber i-3 and reels-the lever 29 to shi-tt the positions of the an; exhaust afalves and thel admission inserire valves. 'lhis i-hii'liup; ol' the i' rw will place the parir-i iu the positions ooo hy the drawinrgs, that is, the Forer ood iio air admi: sion valores :io-d the air urioiiuit ialves, und [he spriop; will hou toi-wu rtf' the Water trom the iiuid wiuoobci into the chamber l, ihr :or pi'rssurr lui'rio huviugi' been i'cduruii by the opnuiup' oi" ihr air eirluiiuit faire 'ir` und the i-ioriliiuij ot ihr air Fil inici( admission v: ic El. it iiuiiipre1-fiori nioior 4i, coiupiisiofij :i diapiu': ih. u head etti, a iiluuuei -i-i. :i ,sioux Aha,

Iii u'rici Will be :Forced by the compre l air 'auto the tluid chanibcr ht und roel-r E221! lo shitt the positions e" ihn air exhaust 'o riff and the a' admission vulves, :oui the spi'iopj L17- 9 will then torce the unter troni the lirici chamber :11i: bach into the rhuiuhor zi ihn oir pressure therein haitiugij been icilurcii io` lll@ @ltlllt' et' tluI air cirhuusi il :,iuil the clof-iingijY oi" the air admire-ii 'Juli-o lit The head Vfifi is provided `with blend hole 55 in the upper part thcrcoi liu luzul 1G is proifided ith i hired holo lu iu the upper part thcrcoi. these hired holes are primarily intended to prevent the i ors trom becominu' air hound as huhu' ro' ius seine air which tends lo separato lhorciroiu. Some water may :pso Mcupc through ,ther-ic bleed holes but the principio oi opoi'ufiou et the pump 'will not be :iliwtcd jproi'iihwl that the bleed holes are f-uullirr iii urea ihuu the intcrifiir cross-scriiuual urnas oi the pipes 39 and 5U.

l'he head l1 ot the pziizip muy hi' op structed .in muy suitable uiuuuro 'the opi ciho coustriu'tion ilhriratcd Ait :thorn ilu tho puirip u1u io pomp chape convenient Venturini oi' woiuli'iuiihu iu ilu` speci lic consi ruci ioo illus( ruimt the drawi u rllhe ilorits il :iul i'if uw provided with lili' stoms i1 and liti which out :ui tlu'oupjh holo: iu the 4ruidos aud fill and they arr also t' i i Illlii provided with steins 6G and 67 which extend through holes in the valve levers G8 and 69, to which the valves d0 and 5l are secured, so that the lloats vrill not open their valves until the water levels in the punip chambers have lirift been lowered to thc lines olf dotation et the lioals all and 52, when li'ui'ther lowering of the Water levels will result in the lowering ol" the floats uulil the :lioat ll coulijicls with the valve lever 6&3 and the :llo-at contacts with the valve lever (if). lilhen a float contacts with its valve lever, :its valve .lever will not at first be moved because the pressure in the puinp chamber is sullieient to hold the valve closed against the lovver end ot the pipe which conirnunicates 'with the motor 'or that chamber, but a continued loweringof the Water level leaves inore of the float out of thevvat-er until a point is reached Where the Weightot the float, in connection with the leverage oit the valve lever, is sullieient to open the valve to adinit Water., 'forced by the compressed air, into the fluid chamber ol the niotor to reverse the positions of the air exhaust and air admission valves. The

, valve lever 68 is pivot-ed by a pivot FO to the pipe 39 and the valve lever 69 is pivoted by a pivot 7l to the pipe 50. A head 2 on the stein 66 raises the valve lever 68 and closes the valve 1l() when the float -ll rises as Water lills the punip chamber l, and a head 73 on the stein 67 raises the valve lever 69 and closes the valve 5l when the float 52 rises as Water fills the pump chamber 2. 'lhe floats il and 52 niust be light enough to 'lioat and heavy enough to open the valves l() and 5l against the pressures in their punip chambers, taking` into account, ot course, the leverages exerted by the valve levers 68 and 69.

lllhe operation of the punip is as follows. 'lhe drawing illustrates the parts in the positions which they occupy when the coinpressed air is exerting pressure on the ivater in the pump ehaniber 2 to expel Water therefrom and vvhen the pump chamber l is filling with Water. rl`he air admission valve l0 is open and the eon'ipressed air is 'l'lowing; troni pipe 8 into air chamber 57 and from there into the valve chest 59 and pump chamber 2. The air exhaust valve ld is held closed because the air pressure in the valve chest 59 is greater than the pressure in the exhaust Chamber' 60. The valve 51 is held closed not only by the buoyancy ot the'l'loat 52 but also because the pressure in the pump chamber 2 is greater than the pressure in the exhaust chamber GO. The water outlet valve 6 'is open and the Water is being,` forced troni the pulnp chamber 2 out through the water discharge pipe 7. the Water level lowers, the surface of the ivater will eventually reach the line ot flon tation of the l'loat 52 and, thereafter, the

float 52 `will descend with the lmveringl ivater level until it res s against the valve lever G9 and its descent is arrested. The ivater leveh however., will continue to lower until so inurh olf the lient is out or vater that its weight ir; sullieient lo overcome the pressure which is holdingv the valve 5l. closed. rl`he lloat o2 tlien drops suddenly opening; the valve 5l Wide. bepause the pressure on opposite sides oit the valve are eipializ'ced the instant that it has been opeiieifl at all. lllatei.' is new 'toreedinto the l'luiid chamber -l; and presses the diaphragm l5, plunger el?, stein t8 and the lower end oit the lever 2S) to the right, openinthe exhaust valve lil, closing the exhaust valve l2 and openiinq` the air admission valve 9, While the spring 1G closes the air admission valve l0. 'lhe air exhausts, reducing` the pressure in the punip ehainber 2 and the pressure of the Water in the Water discharge pipe 'l' closes the Water outlet valve 6 and the pressure oi the Waterinwhich the puinp is subn'iersged opens the water inlet valve fl and lills the pump chainber 2. rlhe spring.; 9, when the pressure is reduced in the pump chamber 2, will torce the Water troni the fluid chaniber 54; bacl; into the puinp ehainber 2 and restore the diapl'iragi'n d5, plunger l? and stein 48 to the positions shown by the drawing. lilith the reversal of the air admission valves and the air eze haust valves, `the compressed air will. toreo the Water troni the puinp chamber l through the pipe 'l' until the air exhaust valves and the air admission valves are restored by the inotor 33 to the positions shown by the drawing', and then the v*ater which has `hlled the punip chamber 2 vvill be expelled, repeating` the cycle o't operation.

The valve levers 68 and {T} are provided with lips l'fl and 75 to contact with stops 76 and 77 `to liinit the downward movements of these valve levers and the valves carried thereby.

The diaphragins 3ft and l5 should be tree to be nioved by fluid pressure or by the springs 38 and L9 and one or more holes 'itl and 79 may be provided communicating with the water in which the puinp is subnierge l. and of suilicient size to perinit free inovenients oli' Water therethrough, so that the freedom of movement of these diaphragins and the plungers 36 and 4'? will not be intered with.

. lWhat is elaiined is:

1. In a pneumatic pump, the combination with puinp chambers provided with Water inlet valves, water outlet valves, air admission valves and air exhaust valves, ot motor mechanism for actuating the air eze haust valves, means unassociated with said air exhaust valves for closing the air admission valves, independent of connections with the exi unfit vzdves, und menne i'oi opening :in nii' :uhnission vulve dui'ingf; :if n'ioi'e ieut o t the uil' dienst wives.

In s pi'ieumzitie pump of the einen hs seiihed, :i plurality ot pump i'heuiheis7 zi telve chest eonnuunieuting with eheh of seid ehznuhei'. :in enhzuiist ehzuuheif common to ioth seid pump ehzimhfn's und eoi'nn'iunieuu ini); therewith through seid vulve Chests, vuiif'es foi' controlling the hi'ttei.' eomn'ninieution, en nii admission ehzimhei nieto common to und communicating nf'ith both seid pump chambers and sziid vulve Chests, vulves mounted in said admission ehumher iiol oonti'oiling; such eoinnninieution, und meuns ihn; actuating said vulves.

En u pneumatic pump oit the eines described, u pluiuiity of pil-imp ehfimheiusv u Y n vulve Chest communicating; with euch oit sum ehun'iheifs an edinust ehsmhei: Common to ho'th seid pump enun'iheis und. eomninn; miingr; therewith thifouggh sziid whe chests, vulves 'for Conti'oiiinlsf the hitter eeuiniuniezition, un :iii: admission ehznnhei' :liso com mon to und Cou'iu'uin outing with hoth seid pump ohzunhei's und seid suive chests? Yeh/'es mounted ,in seid admission ehzin'ihei toi oontioiliug such eonunuuieutien, meuns 'fois :ietuutinp; Suid istnnmed wahresj means inteiposed between seid first und second-named veines toi ei'eetingl' actuation oi? the hitter in one direction hy ineens of the formen? und independent ineens iol actuating seid vulves of the nii.1 admission ehumhei? in the opposite direction.

4. in u pneun'ietie pump of the @hiss deseiihech i jhnfuiiijgf oi: i' np ohumhonsj u wine chest eonnnuni :ating with ouch of siid chambers, un exhaust ehumhei eon'imon to beth seid pump (,fhnmheii's und communicating` therewith through said vfdve chests, vulves toi* eontoiling' the lutter communication7 un siii' admission ehznnhei uiso Conimon to end oommunieutinp; With hoth seid pump chamhes and seid veine chests, wives mounted in seid admission ohzunhei? ,For eontroiiing such Communiefition.4 ineens fof eetueting; one set ot seid wives, ineens Where by the lutter set opeietes the vu Ves of the admission ehnmhei' in one dii'eetion7 und independent .ineens for :ietuetingg the admission ehumhei vulves in the other direction.

5. En i pneumatic pump of the ehiss desolibeChe plurality of pump Chambers, :i

u ,Y :ind mhunuuiruine; the hiihiv, mii'. in s ihists hn' hun' seid ifomuuuiieuiioiu :in :iiiuri vhumhei nommen to hoth smid @hows und A niih poi'js vuuihuuiissd in; thcuwei'i--sieting with panftions i'iieieoi piound 'piifoied eienien 'i mouni'mi in seid, who und u lteiijiused hetu'iwn Ein-ff nu i und Yeh'es und the` sind iii-eti" vom om; :ilt

i Yd @eeuu` --iiuuied i'zdi'ei-i hu' Muir-tim" Innuniiiou et die hithn' ninna i uit tim :toiuiei in one dufeetuin.

ii i one with ti heh A eonnee id ne oi'hei und uuid mi' u. 'in when heuinj unnuuueehuh uw seid edu i Vzifive: tuin amount of isee php; so u not to inter-"- s iiei'e with 'the piffujiei.' uiting: oif uuid wives i the hitter become Wei-n.

7. in u iliiieumnfiaie i ump it the einen sei'ihed, u phufuiiiv et piuup i-huiuhnm :i

(ifi 

